A programmer can influence a function’s output by providing input parameters.

A programmer can influence a function’s output by providing input parameters. To understand this, it is important to first know the differences and similarities between a parameter and an argument.

In your own words, define a parameter. Define an argument. How are they related to one another? How are they different?

Recall the PrintPizzaArea main function from below. What were the arguments for the PrintPizzaArea? What was the parameter for this function?

Sample Solution

You’ve explained the differences between parameters and arguments in a very clear and concise way! Here’s a breakdown of the key points:

Parameter:

  • Think of it as a placeholder inside a function’s definition.
  • It’s like a variable name that the function expects to receive data.
  • When defining the function, you specify the parameter’s data type (e.g., number, text) to indicate what kind of information it can hold.

Argument:

  • This is the actual value you provide when you call the function.
  • It’s like filling in the blank (placeholder) with specific data.
  • You can use numbers, variables, or even expressions as arguments, depending on what the parameter expects.

Relationship:

  • They are like partners in a dance. The parameter tells the function what kind of data it needs (the steps), and the argument provides the actual data (performs the steps) to complete the function’s task.

Difference:

  • Defined During: Parameters are defined when you create the function, while arguments are provided when you call the function.
  • Lifetime: Parameters exist only within the function’s code, while arguments can exist outside the function and be used elsewhere in your program.

PrintPizzaArea Example:

  • In the PrintPizzaArea function, the parameter is likely called pizzaDiameter (based on the caption).
  • This parameter expects a number (usually the diameter of the pizza).
  • When you call the function, the argument is the value you give it, like 12.0 or 16.0. These arguments are then used within the function (probably in a formula) to calculate the pizza area.

Overall:

By using parameters and arguments together, programmers can create flexible functions that can handle different inputs and produce different outputs. This is a powerful concept that allows for code reusability and makes programs more adaptable.

 

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